Question

When is stacking of rigid sterilization containers on the autoclave rack permitted?

1) When the containers are empty
2) When the containers are properly sealed
3) When the containers are labeled with the contents
4) When the containers are made of stainless steel

Answer 1

Stacking of rigid sterilization containers in an autoclave is only permissible when it does not impede steam circulation necessary for proper sterilization, which typically requires temperatures of 121 °C to 132 °C under 15 to 20 psi pressure.

Step-by-step explanation:

Stacking of rigid sterilization containers on the autoclave rack is permissible only under specific conditions to ensure proper sterilization. These conditions are not determined by whether the containers are empty, properly sealed, made of stainless steel, or labeled with contents, as the key to effective autoclaving is ensuring direct steam contact with the items to be sterilized. Containers should generally be left loosely closed to allow the steam to penetrate the contents. Sterilization containers made of materials that can tolerate high temperatures and pressure, like stainless steel, do not guarantee safe stacking if they block the necessary steam circulation.

Autoclaves function by using moist heat at temperatures above the boiling point of water, typically around 121 °C to 132 °C, under pressure between 15 and 20 psi. For effective sterilization, the steam must directly contact the items, which may be compromised if containers block the flow of steam to others during stacking. Hence, stacking is only permissible when it does not impede steam circulation and proper sterilization.